Spiral air pressure spring

  • US 9,133,901 B2
  • Filed: 04/19/2012
  • Issued: 09/15/2015
  • Est. Priority Date: 03/02/2012
  • Status: Active Grant
First Claim
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1. A spiral air pressure spring comprising a spring body, characterized in that, the spring body is formed by an air column having a pressure air containing cavity, the air column is spiral, and at least one vent hole communicated with the containing cavity is arranged on the air column wherein the diameters of the upper and lower mouths of the air column are smaller than the diameters of the spiral mouths in the middle, and the spiral mouths in the middle are consistent in diameter, and wherein connection planes are arranged on the outer sidewalls of the air column.

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